SEAT Workshop Service and Repair Manuals

Checking pistons Special tools and workshop equipment required t  Outer micrometer 75 - 100 mm

Checking pistons –  Measure approx. 7 mm from the lower edge, at an angle of 90° to the axis of the piston pin. Difference in relation to max. specified measurement 0.04 mm. Nominal measurement → Chapter

Checking piston ring gap –  Insert ring at right angles from above into lower cylinder opening approx. 15 mm from edge of cylinder.

Piston ring Dimensions in mm	When new	Wear limit
1. compression ring	0,20 … 0,40	1,0
2. compression ring	0,40 … 0,60	1,0
Oil scraping ring	0,25 … 0,75	---1)

1) No wear limit details possible

Checking play between the rings and grooves Before checking, clean the groove of the rings.

Piston ring Dimensions in mm	When new	Wear limit
1. compression ring	0,03 … 0,09	0,15
2. compression ring	0,02 … 0,06	0,15
Oil scraping ring	Not measurable

Check bore Special tools and workshop equipment required t  Internal dial test indicator 50…100 mm

Check bore –  Take measurements at 3 positions in both lateral direction -A- and longitudinal direction -B-. Deviation to the nominal value: max. 0.08 mm. –  Nominal measurement → Chapter   Note The measurement of the interior diameter of the cylinders cannot be done while the cylinder block is attached to the engine and gearbox support -VAS 6095-, as doing so may result in erroneous measurements.